Citizen Cincom L20-XII
Image: citizenmachinery.co.uk, Citizen Machinery
Key Specifications
Max Spindle
Tool Capacity
max machining diameter
max machining length
max machining length gb 25mm dia spec
max machining length gbl
How much does the Citizen Cincom L20-XII cost?
Estimated price range
Our best estimate for a swiss-type lathe in this class — not a quote from Citizen Machinery. Configuration moves it a long way.
Overview
The Citizen Cincom L20-XII is a 20 mm sliding-headstock automatic lathe from the third L20 generation, with a 25 mm bar option, 10,000 rpm main and back spindles, a Y2 axis with back rotary tools and capacity for 41 tools. Its spec column is identical, row for row, to that of the type XIIB5, the model Citizen describes as capable of simultaneous 5-axis control.
For a buyer the useful comparison is with the Cincom L20-X. Both carry 6 front and 8 back drilling tools, back rotary tools that drill 5 mm and tap M4 at up to 7,500 rpm (rated 6,000 rpm), and a Y2 axis at 8 m/min. Both weigh 2,680 kg. The Cincom L20-X, however, lists 25 rotary positions on the gang tool post and 45 tools, while the L20-XII lists 21 and 41. Citizen's table does not show what occupies the space on the type XII's gang post, so ask for the tooling layout drawing before quoting a part with many front-end operations.
Main spindle drive is rated 2.2 kW continuous, 3.7 kW for 15 minutes and 5.5 kW at 10%ED, which suits small-diameter steel and brass at the 10,000 rpm ceiling. The back spindle drive gives 1.5/2.2/3.7 kW (continuous/40%ED/10%ED). The 21 gang rotary tools drill to 8 mm and tap to M6 at up to 6,000 rpm, or 9,000 rpm with the S3 high-power motor of 2.2 kW.
Setup limits match the rest of the series. Guide-bush machining covers 200 mm per chucking (188 mm with 25 mm bar) and guide-bushless machining 50 mm. Turning tools are 12 mm square, with 13 mm and 16 mm optional, and sleeves are 25 mm or 19.05 mm. The machine needs 8.3 kVA, a 60 A breaker and 0.5 MPa air.
Full Specifications
| Parameter | Value |
|---|---|
| Max Machining Diameter | 20 mm dia.(25 mm dia.OP.) |
| Max Machining Length | 200 mm per chucking |
| Max Machining Length Gb 25mm Dia Spec | 188 mm per chucking |
| Max Machining Length Gbl | max. 50 mm per chucking (GBL) |
| Max Drilling Diameter | 10 mm dia. |
| Max Tapping Diameter | M8 (cutting tap) |
| Spindle Bore | 26.4 mm dia. |
| Max Spindle Speed | max. 10,000 rpm |
| Sub Spindle Chuck Diameter | dia. 20 mm, dia. 25 mm[1”]option |
| Max Part Ejection Length | 130 mm |
| Max Workpiece Protrusion Length of Back Spindle | 40 mm |
| Back Machining Max Drilling Diameter | 8 mm dia. |
| Back Machining Max Tapping Diameter | M8 (cutting tap) |
| Sub Spindle Speed | max. 10,000 rpm |
| Gang Tool Post Rotary Tool Max Drilling Diameter | 8 mm dia. |
| Gang Tool Post Rotary Tool Max Tapping Diameter | M6 (cutting tap) |
| Gang Tool Post Rotary Tool Spindle Rotation | max. 6,000 rpm (rated speed: 4,500 rpm) |
| Gang Tool Post Rotary Tool | S3 high-power motor specifications: max. 9,000 rpm (rated speed: 9,000 rpm) |
| Rotary Tools on The Opposite Tool Post | max. 6,000 rpm (rated speed:4,500 rpm) |
| Rotary Tools on The Opposite Tool Post Max Drilling Diameter | 5 mm dia. |
| Rotary Tools on The Opposite Tool Post Max Tapping Diameter | M4 (cutting tap) |
| Rotary Tools on The Opposite Tool Post Spindle Rotation | max. 7,500 rpm (rated speed:6,000 rpm) |
| Back Rotary Tool Max Drilling Diameter | 5 mm dia. |
| Back Rotary Tool Max Tapping Diameter | M4 (cutting tap) |
| Back Rotary Tool Spindle Rotation | max. 7,500 rpm (rated speed:6,000 rpm) |
| Tool Capacity | 41 |
| Number of Mountable Tools Turning Tools on The Gang Tool Pos | 6 |
| Number of Mountable Tools Rotary Tools on The Gang Tool Post | 21 |
| Number of Mountable Tools Front Drilling Tools | 6 |
| Number of Mountable Tools Back Drilling Tools | 8 |
| Tool Size Turning Tools | 12 mm Sq. (13 mm Sq., 16 mm Sq.) |
| Tool Size Sleeve | 25 mm dia.(GDS107, 210) 19.05 mm dia. |
| Chuck Bushing Front Spindle Collet Chuck | FC034-M, FC071-M(φ 25 mm [1”]) |
| Chuck Bushing Back Spindle Collet Chuck | FC034-M-K, FC071-M-K(φ 25 mm [1”]) |
| Chuck Bushing Rotary Tool Collet Chuck | ER11, ER16 |
| Chuck Bushing Chuck for Drill Sleeve | ER11, ER16 |
| Chuck Bushing Guide Bushing | WFG206-M, DFG206-M, FG521-M(φ25 mm [1"]) |
| Rapid Feed Rate X1 Y1 Z1 X2 Z2 Axis | 32 m/min |
| Rapid Feed Rate Y2 Axis | 8 m/min |
| Motor for Front Spindle Drive | 2.2/3.7/5.5 kW (continuous/15 minute/10%ED ratings) |
| Motor for Back Spindle Drive | 1.5/2.2/3.7 kW (continuous/40%ED/10%ED ratings) |
| Motor for Driving Rotary Tools on The Gang Tool Post | 1.0 kW(2.2 kW with S3 high-power motor specifications) |
| Motor for Front Rotary Tool Drive | 0.75 kW |
| Motor for Back Rotary Tool Drive | 0.75 kW |
| For Coolant | 0.4 kW |
| Rated Power Consumption | 8.3 kVA |
| Load Operation Average Power Consumption | 4.5 kVA |
| Total Load Current | 37 A(41 A with S3 high-power motor specifications) |
| Main Breaker Capacity | 60 A |
| Power Supply Voltage | AC 200V ± 10% |
| Pneumatic Device Required Pressure | 0.5 MPa |
| Pneumatic Device Required Flow Rate | 52/ 55/ 177 L/min (Power ON/Normal/ With air blow) |
| Floor Space Required | W2,222 × D1,265 × H1,835 mm |
| Center Height | 1,050 mm |
| Machine Weight | 2,680 kg |
Specifications sourced from cmj.citizen.co.jp — verified 2026-10-03
Strengths & Limitations
Strengths
- Y2 axis with back rotary tools: 5 mm drilling and M4 tapping at up to 7,500 rpm
- 41 tools, including 6 front and 8 back drilling tools
- Main spindle drive rated 2.2/3.7/5.5 kW (continuous/15 minute/10%ED) at up to 10,000 rpm
- Accepts 25 mm (1 in) bar with the optional specification
- Turning tools of 12 mm square as standard, with 13 mm and 16 mm square options
Limitations
- 21 rotary positions on the gang tool post, against 25 on the Cincom L20-X
- 41 tools in total, four fewer than the 45 of the Cincom L20-X
- Back rotary tools run on 0.75 kW and are limited to 5 mm drills and M4 taps
- Y2 rapid of 8 m/min, well below the 32 m/min of the other axes
Best For
Frequently Asked Questions
01
The tooling layout on the gang tool post. The Cincom L20-X lists 25 gang rotary tools and 45 tools in total; the L20-XII lists 21 and 41. Back rotary tools, the Y2 axis, the drilling tool counts, spindle speeds and the 2,680 kg weight are the same in both columns.
02
Their spec columns on Citizen's series page are identical. Citizen describes the type XIIB5 as the model in the lineup that allows simultaneous 5-axis control, so that capability is what separates the two; the table itself shows no differing figure.
03
They drill up to 5 mm and tap up to M4 with cutting taps, at up to 7,500 rpm (rated 6,000 rpm), driven by a 0.75 kW motor. The Y2 axis moves them at a rapid rate of 8 m/min. The back spindle itself drills to 8 mm and taps to M8.
04
Turning tools are 12 mm square as standard, with 13 mm and 16 mm square listed as options. Sleeves are 25 mm (GDS107, 210) or 19.05 mm in diameter. Rotary tools and drill sleeves use ER11 and ER16 collet chucks.
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